Question

1. a student makes a claim that plants use matter from the atmosphere to build glucose (and other plant biomass).

describe evidence from your observations of co₂ that support this claim.
the amount of o₂ increases during the first 30 minutes.
the amount of co₂ increases during the first 30 minutes.
the amount of o₂ decreases during the first 30 minutes.
the amount of co₂ decreases during the first 30 minutes.

Explanation:

Plants use carbon dioxide ($CO_2$) from the atmosphere in the process of photosynthesis. The chemical formula for photosynthesis is $6CO_2 + 6H_2O
ightarrow C_6H_{12}O_6+6O_2$. If plants are using $CO_2$ to build glucose (biomass), then the amount of $CO_2$ should decrease as it is being consumed in the reaction.

Answer:

The amount of $CO_2$ decreases during the first 30 minutes.